JP2973150B2 - Engine with sub-chamber with control valve - Google Patents
Engine with sub-chamber with control valveInfo
- Publication number
- JP2973150B2 JP2973150B2 JP4271071A JP27107192A JP2973150B2 JP 2973150 B2 JP2973150 B2 JP 2973150B2 JP 4271071 A JP4271071 A JP 4271071A JP 27107192 A JP27107192 A JP 27107192A JP 2973150 B2 JP2973150 B2 JP 2973150B2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- sub
- control valve
- engine
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007921 spray Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000000446 fuel Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Description
【０００１】[0001]
【産業上の利用分野】本発明は燃焼室の主室と副室間に
制御弁を備えて高圧縮比で作動する制御弁付き副室を有
するエンジンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine having a control valve between a main chamber and a sub-chamber of a combustion chamber and having a sub-chamber with a control valve which operates at a high compression ratio.
【０００２】[0002]
【従来の技術】車両用エンジンには圧縮比の大きな圧縮
着火エンジンとして大別して直接噴射式と副室を備えた
予燃焼室式とがあり、さらに予燃焼室式の副室と主室と
の流路に連絡孔を設け、燃料の燃焼状態の改善を図った
ものがある。2. Description of the Related Art Vehicular engines are roughly classified into compression ignition engines having a high compression ratio, a direct injection type and a pre-combustion chamber type having a sub-chamber. There is one in which a communication hole is provided in a flow path to improve the combustion state of fuel.
【０００３】[0003]
【発明が解決しようとする課題】上述のように副室と主
室との間に連絡孔を設けた圧縮着火エンジンでは副室内
に噴射された燃料は余り活発な燃焼が進展しないが燃料
としてガソリン、メタノール等を用いた場合、圧縮比を
大きくすると自発火が発生し燃焼を制御出来ない。そこ
で副室と主室間に制御弁をおき、エンジンの圧縮行程の
始めに自発火しないようにする。その構造を持つ副室で
は空気不足で自発火せず、また制御弁の開弁には主室側
からの圧縮圧気の圧力がかかるため大きな駆動力を必要
とし、電磁力にて開弁するには大きな電磁装置と大電力
が必要となる。As described above, in the compression ignition engine in which the communication hole is provided between the sub-chamber and the main chamber, the fuel injected into the sub-chamber does not progress very actively but the gasoline is used as fuel. When methanol or the like is used, if the compression ratio is increased, spontaneous ignition occurs and combustion cannot be controlled. Therefore, a control valve is provided between the sub chamber and the main chamber to prevent spontaneous ignition at the beginning of the compression stroke of the engine. The sub-chamber with this structure does not self-ignite due to lack of air, and the control valve is opened by the pressure of the compressed air from the main chamber, requiring a large driving force. Requires large electromagnetic devices and large power.
【０００４】本発明はこのような問題に鑑みてなされた
ものであり、その目的は主室の頂部から副室上部に至る
小連通孔を設け、副室内の燃焼を進展させて制御弁を容
易に開弁させようとする制御弁付き副室を有するエンジ
ンを提供することにある。The present invention has been made in view of such a problem, and an object of the present invention is to provide a small communication hole from the top of the main chamber to the upper part of the sub-chamber so that the combustion in the sub-chamber can be advanced to facilitate the control valve. It is an object of the present invention to provide an engine having a sub-chamber with a control valve which is to be opened.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
めに本発明によれば、予燃焼室となる副室と主室との間
の連絡口に配置され主室側に移動して開弁する制御弁を
備えた制御弁付き副室を有するエンジンにおいて、前記
の連絡口以外に主室と副室上部とを連通する小連通孔
と、副室側壁に設けられ内壁に吹付ける主噴霧と上方に
向ける副噴霧とを噴射する噴射ノズルと、前記の制御弁
を下方に駆動する電磁装置とを備えた制御弁付き副室を
有するエンジンが提供される。According to the present invention, in order to achieve the above object, the present invention is arranged at a communication port between a sub-chamber, which is a pre-combustion chamber, and a main chamber, and moves to the main chamber side to open. In an engine having a sub-chamber with a control valve having a control valve to be valved, a small communication hole communicating between the main chamber and the upper part of the sub-chamber other than the communication port, and a main spray sprayed on the inner wall provided on a side wall of the sub-chamber. An engine having a sub-chamber with a control valve, comprising: an injection nozzle for injecting the sub-spray upwardly and an electromagnetic device for driving the control valve downward.
【０００６】[0006]
【作用】副室と主室との間の制御弁にて開閉される連絡
口以外に、主室から副室上部に至る小連通孔を設けると
ともに、副噴霧を副室上方に噴射するので、小連通孔を
通って侵入した空気と気化活性化した燃料が反応し副室
上部から副噴霧の燃焼が開始されて、その膨張により制
御弁が下方に押圧されることになり、制御弁を下方に駆
動する電磁装置は大出力でなくとも容易に開弁でき、主
噴霧による副室下方の未燃混合気が主室に押出される。[Function] In addition to the communication port opened and closed by the control valve between the sub-chamber and the main chamber, a small communication hole from the main chamber to the upper part of the sub-chamber is provided, and the sub-spray is sprayed above the sub-chamber. The air that has entered through the small communication hole reacts with the vaporized and activated fuel, and the combustion of the sub-spray starts from the upper part of the sub-chamber, and the expansion causes the control valve to be pressed downward. The electromagnetic device that is driven to open the valve easily can open the valve even if the output is not large, and the unburned air-fuel mixture below the sub-chamber by the main spray is pushed out to the main chamber.
【０００７】[0007]
【実施例】つぎに本発明の実施例について図面を用いて
詳細に説明する。Next, an embodiment of the present invention will be described in detail with reference to the drawings.
【０００８】図１は本発明にかかる制御弁付き副室を有
するエンジンの一実施例を示す構成ブロック図であり、
図２は本実施例における副室内の噴霧の状態を示す説明
図である。FIG. 1 is a block diagram showing an embodiment of an engine having a sub-chamber with a control valve according to the present invention.
FIG. 2 is an explanatory diagram showing a state of spraying in the sub-chamber in the present embodiment.
【０００９】これらの図面において、１はシリンダで、
ピストン２が上下に移動自在に取付けられ、シリンダヘ
ッド１１には副室３や吸排気弁４などが備えられてい
る。In these figures, 1 is a cylinder,
The piston 2 is vertically movably mounted, and the cylinder head 11 is provided with a sub-chamber 3 and an intake / exhaust valve 4.
【００１０】副室３はその内壁部分は高強度を有すると
ともに耐熱性のセラミックスにより形成され、中央部分
には例えば窒化珪素からなるセラミックスの制御弁５が
設けられ、副室３の上壁部中央に設けられた軸穴３１に
より上下に移動自在に支持されている。そして副室３と
主室１２とを結ぶ連絡口３２の主室側には弁座３３が設
けられ、制御弁５の茸弁５１が下方から当接して流路を
開鎖するように構成されている。The sub-chamber 3 has a high-strength and heat-resistant ceramic inner wall portion, and a ceramic control valve 5 made of, for example, silicon nitride. Are supported so as to be movable vertically. A valve seat 33 is provided on the main chamber side of the communication port 32 connecting the sub chamber 3 and the main chamber 12, and the mushroom valve 51 of the control valve 5 is configured to abut from below to open the flow path. I have.
【００１１】また、前述の軸穴３１の上方にはコイル６
１やヨーク６２を備えた電磁装置６が配置され、制御弁
５のステム５２の上部に取付けられた吸着板６３を下方
に吸着することによって制御弁５は開弁される。なお、
３４は小連通孔で、主室上部のシリンダヘッド１１を貫
通して副室３の上部に至る、すなわち主室１２と副室３
とを連通するサブ流路となるもので、その流路の断面積
は例えば副室３の下方の連絡口３２の０．３〜０．７％
程度に設定されている。そして、エンジンの圧縮行程に
て主室１２の空気が圧縮されると、圧気が小連通孔３４
を介して副室３に導かれ、噴射ノズル３５から噴霧され
たパイロット噴射となる副噴霧３６と混合して燃焼を開
始し、その燃焼による膨張にて制御弁５を押下げる力が
働くとともに、主噴霧３７による混合気を主室１２に圧
出させるように構成されている。The coil 6 is provided above the shaft hole 31.
The control device 5 is opened by adsorbing the suction plate 63 attached to the upper part of the stem 52 of the control valve 5 downward. In addition,
Numeral 34 denotes a small communication hole which penetrates through the cylinder head 11 in the upper part of the main chamber to reach the upper part of the sub chamber 3, ie, the main chamber 12 and the sub chamber 3
And the cross-sectional area of the sub-channel is, for example, 0.3 to 0.7% of the communication port 32 below the sub-chamber 3.
Set to about. When the air in the main chamber 12 is compressed in the compression stroke of the engine, the compressed air is released from the small communication holes 34.
Is introduced into the sub-chamber 3 via the sub-chamber 3 and is mixed with the sub-spray 36, which is a pilot injection sprayed from the injection nozzle 35, to start combustion. The air-fuel mixture by the main spray 37 is pressed out to the main chamber 12.
【００１２】つぎにこのように構成された本実施例の作
動を説明すると、エンジンの圧縮行程にてシリンダ１の
内部は圧縮され、小連通孔３５を通じて圧気の一部が副
室３の上方に渦巻くように吹付けられる。そして噴射ノ
ズル３５から噴射される副噴霧３６と混合して燃焼し、
その膨張により内圧を高めて制御弁５に押下力が働くと
ともに、通電された電磁装置６が吸着板６３を下降させ
る吸引力と相俟って制御弁５を開弁させる。したがっ
て、副室３の上部の副噴霧３６の燃焼ガスはその下方の
主噴霧３７による未燃焼混合気を連絡口３２を主室１２
に押出し、ピストン２の上面の凹部２１を含む主室１２
にて効率よく燃焼させ、ピストン２を下降させて力強い
エンジントルクを発生させることになる。Next, the operation of this embodiment constructed as described above will be described. During the compression stroke of the engine, the inside of the cylinder 1 is compressed, and a part of the compressed air passes through the small communication hole 35 above the sub-chamber 3. Sprayed in a spiral. And it mixes with the sub spray 36 injected from the injection nozzle 35 and burns,
The expansion causes the internal pressure to be increased to exert a pressing force on the control valve 5, and the energized electromagnetic device 6 opens the control valve 5 in combination with the suction force for lowering the suction plate 63. Therefore, the combustion gas of the sub-spray 36 in the upper part of the sub-chamber 3 transfers the unburned mixture by the main spray 37 below the communication port 32 to the main chamber 12.
And the main chamber 12 including the recess 21 on the upper surface of the piston 2
And the piston 2 is lowered to generate a powerful engine torque.
【００１３】以上、本発明を上述の実施例によって説明
したが、本発明の主旨の範囲内で種々の変形が可能であ
り、これらの変形を本発明の範囲から排除するものでは
ない。Although the present invention has been described with reference to the above-described embodiments, various modifications are possible within the scope of the present invention, and these modifications are not excluded from the scope of the present invention.
【００１４】[0014]
【発明の効果】上述の実施例のように本発明によれば、
副室の下方の連絡口以外に、主室から副室上部に至る小
連通孔を設けたので、圧縮行程における主室内の圧気の
一部は噴射ノズルから噴射される副噴霧と副室上部で混
合して燃焼が開始され、この燃焼による膨張にて制御弁
には主室側に押される力が働くとともに電磁装置の電磁
力と相俟って制御弁が下方に開弁され、副室内下方の主
噴霧による未燃焼混合気が主室に押出されて効率よく燃
焼が行われる。According to the present invention as in the above embodiment,
In addition to the communication port below the sub chamber, a small communication hole from the main chamber to the upper part of the sub chamber is provided, so that part of the compressed air in the main chamber during the compression stroke is Mixing starts combustion, and the expansion caused by the combustion acts on the control valve to push the control valve toward the main chamber, and the control valve is opened downward together with the electromagnetic force of the electromagnetic device. The unburned air-fuel mixture by the main spray is extruded into the main chamber, and combustion is performed efficiently.
【００１５】また、本発明によれば制御弁の開弁に際
し、副噴霧の燃焼があるため、その膨張力により電磁装
置は大出力を要せずに制御弁を下方に圧して容易に開弁
できる効果が得られる。Further, according to the present invention, when the control valve is opened, since the auxiliary spray is burned, the expansion force causes the electromagnetic device to easily open the control valve by pressing the control valve downward without requiring a large output. The effect that can be obtained is obtained.
【図１】本発明にかかる制御弁付き副室を有するエンジ
ンの一実施例を示す構成ブロック図である。FIG. 1 is a configuration block diagram showing an embodiment of an engine having a sub-chamber with a control valve according to the present invention.
【図２】本実施例における副室内の噴霧の状態を示す説
明図である。FIG. 2 is an explanatory diagram showing a state of spray in a sub-chamber in the present embodiment.
１…シリンダ ３…副室 ５…制御弁 ６…電磁装置 １２…主室 ３２…連絡口 ３４…小連通孔 ３５…噴射ノズル DESCRIPTION OF SYMBOLS 1 ... Cylinder 3 ... Subchamber 5 ... Control valve 6 ... Electromagnetic device 12 ... Main chamber 32 ... Communication port 34 ... Small communication hole 35 ... Injection nozzle
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ０２Ｍ 61/14 ３１０ Ｆ０２Ｍ 61/14 ３１０Ｐ (58)調査した分野(Int.Cl.6，ＤＢ名) F02B 19/02 F02B 19/16 F02B 19/18 F02M 61/14 310 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 identification code FI F02M 61/14 310 F02M 61/14 310P (58) Fields investigated (Int.Cl. 6 , DB name) F02B 19/02 F02B 19 / 16 F02B 19/18 F02M 61/14 310
Claims (2)
に配置され主室側に移動して開弁する制御弁を備えた制
御弁付き副室を有するエンジンにおいて、前記の連絡口
以外に主室と副室上部とを連通する小連通孔と、副室側
壁に設けられ内壁に吹付ける主噴霧と上方に向ける副噴
霧とを噴射する噴射ノズルと、前記の制御弁を下方に駆
動する電磁装置とを備えたことを特徴とする制御弁付き
副室を有するエンジン。An engine having a sub-chamber with a control valve, which is provided at a communication port between a sub-chamber serving as a pre-combustion chamber and a main chamber and has a control valve which moves to the main chamber and opens the valve. A small communication hole that communicates between the main chamber and the upper part of the sub chamber other than the communication port, an injection nozzle that is provided in the side wall of the sub chamber and sprays the main spray sprayed on the inner wall and the sub spray directed upward, and the control valve. And an electromagnetic device for driving the engine downward.
開口面積の０．３％乃至０．７％に設定したことを特徴
とする請求項１記載の制御弁付き副室を有するエンジ
ン。2. The sub-chamber with a control valve according to claim 1, wherein the cross-sectional area of the flow passage of the small communication hole is set to 0.3% to 0.7% of the opening area of the communication port. Having an engine.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4271071A JP2973150B2 (en) | 1992-09-14 | 1992-09-14 | Engine with sub-chamber with control valve |
| DE69324424T DE69324424T2 (en) | 1992-09-14 | 1993-09-14 | High compression internal combustion engine |
| EP93307223A EP0588592B1 (en) | 1992-09-14 | 1993-09-14 | High compression ratio internal-combustion engine |
| US08/548,254 US5603298A (en) | 1992-09-14 | 1995-10-25 | High compression ratio internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4271071A JP2973150B2 (en) | 1992-09-14 | 1992-09-14 | Engine with sub-chamber with control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0693857A JPH0693857A (en) | 1994-04-05 |
| JP2973150B2 true JP2973150B2 (en) | 1999-11-08 |
Family
ID=17494985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4271071A Expired - Lifetime JP2973150B2 (en) | 1992-09-14 | 1992-09-14 | Engine with sub-chamber with control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2973150B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1264088A4 (en) * | 2000-03-09 | 2008-04-16 | Michael Patrick Dixon | Homogeneous or premixed charge auto-ignition engine |
| JP5920317B2 (en) * | 2013-11-13 | 2016-05-18 | 株式会社デンソー | Sub-chamber internal combustion engine |
-
1992
- 1992-09-14 JP JP4271071A patent/JP2973150B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0693857A (en) | 1994-04-05 |
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